Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca134dc261b8ed9…

MALICIOUS

PDF

81.5 KB Created: 2021-09-03 03:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 22c06689d41eca892e75f1b1e1f056a5 SHA-1: b5c08bbb2fc14a0a90308f4f5a76a329cc8e2918 SHA-256: 5ca134dc261b8ed932a3366559b88fa79e150df0b3f8caaa6c718389b14d0326
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and a high number of PDF links indicates a coordinated effort to distribute malicious content or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06d07b5eec---samavuzunigobemizelenu.pdf In PDF document text
    • https://carlojans.com/cms/file/zuxipiwetefepipinibujabi.pdfIn PDF document text
    • https://noddy.nu/images/file/xuwuxafeli.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9cb24b6f77---nizotedulevuzowemitupoba.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/m6e5lfiiufigdl3hn3q5cth4u0/50908041429.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/28149198856.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/11761022378.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e25a38a3e2b---80372413781.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/83761622f12d0f4c2abf8f6c4394ef37/73255903270.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/jumibigokegikekawel.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c0a4e168---sijitenipuziv.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/46751710467.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16088ff69bb6bc---vigunuxekonon.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/fubogagukeloxener.pdfIn PDF document text
    • https://hosrem.org.vn/ckfinder/userfiles/files/90577082151.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/wovuletuwisajawiw.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/41113066455.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/71685186612.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb7a946c4b---fegidano.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/jilafanaxijarexu.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1235epimm4ep3iov609hsad3u5/8922793012.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8d81b81531a6a3db36e79fae33e383e2/86678442726.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/bofebudebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=grundlagen+investition+und+finanzierung+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 10936 bytes
SHA-256: 4270c1a733a1d40f9886b445e2a3f82053a9a0f00a75933eacd167217d3936a5
font_02_sfnt_off00010614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10614 19568 bytes
SHA-256: 916f8463186935269acd5b36a76e88a196c98d8d68a4e5cd70549e27f4e7cfa7

Open this report in the interactive analyzer, or submit your own file for analysis.